linux-kernel - Re: [PATCH v2] ARM: S3C24XX: Add WIZnet W5300E01-ARM board support

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Date:	Mon, 03 Sep 2012 21:26:42 +0200
From:	Sylwester Nawrocki <sylvester.nawrocki@...il.com>
To:	Taehun Kim <kth3321@...il.com>
CC:	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ARM: S3C24XX: Add WIZnet W5300E01-ARM board support

On 09/03/2012 07:36 PM, Taehun Kim wrote:
> +static void __init w5300e01_init(void)
> +{
> +	s3c_nand_set_platdata(&w5300e01_nand_info);
> +	platform_add_devices(w5300e01_devices, ARRAY_SIZE(w5300e01_devices));
> +
> +	/* W5300 interrupt pin. */
> +	s3c_gpio_cfgpin(S3C2410_GPF(0), S3C2410_GPIO_IRQ);
> +
> +	s3c_gpio_cfgpin(S3C2410_GPF(4), S3C2410_GPIO_OUTPUT);
> +	s3c_gpio_cfgpin(S3C2410_GPF(5), S3C2410_GPIO_OUTPUT);
> +	s3c_gpio_cfgpin(S3C2410_GPF(6), S3C2410_GPIO_OUTPUT);
> +	s3c_gpio_cfgpin(S3C2410_GPF(7), S3C2410_GPIO_OUTPUT);

Please don't use these obsolete S3C2410_GPIO_* defines, they will be
gone soon, if aren't yet.

> +	gpio_set_value(S3C2410_GPF(0), 1);
> +	gpio_set_value(S3C2410_GPF(4), 1);
> +	gpio_set_value(S3C2410_GPF(5), 1);
> +	gpio_set_value(S3C2410_GPF(6), 1);
> +	gpio_set_value(S3C2410_GPF(7), 1);

Instead I would do something like:

8<-----------------------------------------------------------------

static const struct gpio gpios[] = {
	{ S3C2410_GPF(4), GPIOF_OUT_INIT_HIGH, NULL },
	{ S3C2410_GPF(5), GPIOF_OUT_INIT_HIGH, NULL },
	{ S3C2410_GPF(6), GPIOF_OUT_INIT_HIGH, NULL },
	{ S3C2410_GPF(7), GPIOF_OUT_INIT_HIGH, NULL },
};

if (!WARN_ON(gpio_request_array(gpios, ARRAY_SIZE(gpios)))
	gpios_free_array(gpios);

/* W5300 interrupt pin. */
if (!WARN_ON(gpio_request(S3C2410_GPF(0), GPIOF_IN, NULL))) {
	s3c_gpio_cfgpin(S3C2410_GPF(0), S3C_GPIO_SFN(2)); /* EINT0 */
	gpio_free(S3C2410_GPF(0));
}

8<-----------------------------------------------------------------

--

Regards,
Sylwester
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